Hookah stem



FIG. 1 is an orthographic view of a hookah base showing the new design.

FIG. 2 is a top perspective view of the hookah stem; and,

FIG. 3 is a lower perspective view of the hookah stem.

The hookah stem is understood to be radially symmetric. The broken, dotted lines depict portions of the hookah stem which form no part of the claimed design. 

CLAIM The ornamental design for a hookah stem, as shown and described. 